Lm567

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LM567,LM567C

LM567/LM567C Tone Decoder

Literature Number: SNOSBQ4B

LM567/LM567C

October 13, 2011

Tone Decoder
General Description
The LM567 and LM567C are general purpose tone decoders
designed to provide a saturated transistor switch to ground
when an input signal is present within the passband. The circuit consists of an I and Q detector driven by a voltage
controlledoscillator which determines the center frequency of
the decoder. External components are used to independently
set center frequency, bandwidth and output delay.

Features
■ 20 to 1 frequency range with an external resistor
■ Logic compatible output with 100 mA current sinking
capability

■ Bandwidth adjustable from 0 to 14%






High rejection of out of band signals and noiseImmunity to false signals
Highly stable center frequency
Center frequency adjustable from 0.01 Hz to 500 kHz

Applications








Touch tone decoding
Precision oscillator
Frequency monitoring and control
Wide band FSK demodulation
Ultrasonic controls
Carrier current remote controls
Communications paging decoders

Connection Diagrams
Metal Can Package

Dual-In-Line andSmall Outline Packages

697501

Top View
Order Number LM567H or LM567CH
See NS Package Number H08C

© 2011 National Semiconductor Corporation

697502

Top View
Order Number LM567CM
See NS Package Number M08A
Order Number LM567CN
See NS Package Number N08E

6975

6975 Version 4 Revision 4

www.national.com
Print Date/Time: 2011/10/13 13:08:05

LM567/LM567C Tone DecoderOBSOLETE

LM567/LM567C

LM567H
LM567CH, LM567CM, LM567CN
Soldering Information
Dual-In-Line Package

Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage Pin
Power Dissipation (Note 2)
V8
V3
V3
Storage Temperature RangeOperating Temperature Range

−55°C to +125°C
0°C to +70°C

  Soldering (10 sec.)
Small Outline Package

260°C

  Vapor Phase (60 sec.)

9V
1100 mW
15V
−10V
V4 + 0.5V
−65°C to +150°C

215°C

  Infrared (15 sec.)
220°C
See AN-450 “Surface Mounting Methods and Their Effect
on Product Reliability” for other methods of soldering
surface mount devices.

Electrical CharacteristicsAC Test Circuit, TA = 25°C, V+ = 5V
Parameters

LM567

Conditions

LM567C/LM567CM

Units

Min

Max

Min

Typ

Max

4.75

Power Supply Voltage Range

Typ
5.0

9.0

4.75

5.0

9.0

V

Power Supply Current Quiescent

RL = 20k

6

8

7

10

mA

Power Supply Current Activated

RL = 20k

11

13

12

15

mA

25

mVrms

Input Resistance18

Smallest Detectable Input Voltage

IL = 100 mA, fi = fo

Largest No Output Input Voltage

IC = 100 mA, fi = fo

20
20

10

15
25

20

Largest Detection Bandwidth

12

mVrms

6

dB

−6

Minimum Input Signal to Wideband Noise Bn = 140 kHz
Ratio

15

6

Largest Simultaneous Outband Signal to
Inband Signal Ratio

15

10

−6

dB

LargestDetection Bandwidth Variation
with Temperature

14

16

1

Largest Detection Bandwidth Skew

10

4.75–6.75V

±1

Highest Center Frequency

100

Center Frequency Stability (4.75–5.75V)

0 < TA < 70
−55 < TA < +125

Center Frequency Shift with Supply
Voltage

4.75V–6.75V
4.75V–9V

Fastest ON-OFF Cycling Rate

18

% of fo

3

% of fo

±0.1
±2

500

±1
100%/°C
±5

%V

1.0
2.0

fo/20

500

kHz

35 ± 60
35 ± 140

35 ± 60
35 ± 140
0.5

14
2

2

±0.1

Largest Detection Bandwidth Variation
with Supply Voltage



20

ppm/°C
ppm/°C

0.4

2.0
2.0

%/V
%/V

fo/20

Output Leakage Current

V8 = 15V

0.01

25

0.01

25

µA

Output Saturation Voltage

ei = 25 mV, I8 = 30 mA
ei = 25 mV, I8 = 100...
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